Draft-regulator



(No Moden 2 sheets-sheet 1.

' H. D. BANNSTER.

DRAFT REGULATOR. No. 288,914. PatenteiNQV. 2041883.

N. PETERS Pham-Luhmann wasmngmn. nc.

2 sheets sheen. 2.

(No Model.)

DRAFT REGULATOR.

Puatented Nov. 20

No. 288,914k

'UNITED STATES l PATENT Ormes.

HENRY l). BANNISTER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TOROLAND II. SMITH, OF PITTSBURG, PENNSYLVANIA.

DRAFT-REGU LATO R.

SPECIFICATION" forming part of Letters Patent No. 288,914, datedNovember 20, 1883.

Application filed March 16, 1883.

' clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,making a part of this specification.

This invention relates to certain improvement-s in steamboilers andfurnaces; and it has for its objects to consume the smoke and provide arapid draft .through the furnace, and thereby economize fuel and providefor the rapid generation of dry or superheated steam, as more fullyhereinafter set forth. These obj ects I attain by the means illustratedin the accompanying drawings, in which- Figure l represents a verticalsectional view of a portion of a locomotive-boiler and my invention asapplied thereto; Fig. 2, a trans verse vertical section on the line :u xof Fig. l; Fig. 3, a sectional view, showing a valve employed inconnection with my invention; and Fig. 4, a sectional view of a portionoi' a stationary boiler, showing my invention applied thereto.

In the drawings, the letter A. indicates the shell ofthe boiler, whichmay be of the usual or any approved construction, and B t-he smoke` boxthereof.

rIhe letter C indicates a superheater constructed of metal, of a pear orballoon shape, preferably, or approximating thereto. The saidsuperheater is located in the smoke-stack, being supported therein inany convenient manner, its lower end connecting with adownwardlyextending pipe, D, which connects with the boiler above thewater-line thereof.

The letter E indicates a blower, which consists of an annular pipelocated in the lower part of the smoke-stack, and provided with aseries. of perforations, as shown. The said blower is connected by meansof a pipe, F, with the upper part of the superheater, which is providedwith a valve, G, by means of which steam may be supplied from thesuperheater (No model.)

and blown into the smoke-stack through the 5o perforations in theannular pipe, so as to create a draft and decompose and consume thesmoke or products of combustion passing out ofthe stack.

When employed in connection with a locomotive-boiler, a pipe, II,extends up through the pipe l) into the superheate1,thc said pipe beingconnected to a valve-chest, I, which connects with a pipe, Ii, leadingto the steamchest of the cylinders. The said valve-chest 6o is providedwith a valve, L, the valve-rod of which passes through a suitablepacking-box, and connects with a lever, M, having a rod,

N, extending back to the cab, in order that the valve may be readilyoperated by the engineer. In this case also the valve-rod ofthe valve Gis provided with a rod, I), extending' back to the cab, to permit saidvalve to be conveniently operated.

In the modification shown in Fig. 4 of the 7o drawings the pipeconnecting with the upper' part of the superheater extends back to thesafety-valve of the boiler and connects with the casing of the same.

The valves for regulating and controlling the dow of steam in myimproved device may be of any description; but I prefer the form shownin Fig. 3, in which an oscillating valve is arranged to work in acylindrical valvechamber, this form of valve being specially ap- Soplicable when located at the lower end of the tube K, as indicated inFig. 2.

'Ihe operation of my invention will be understood in connection with theabove descrip; tion, and is as follows: 1When it is desired to S5 urgethe draft and consume the smoke, the steam is admitted to the blowerfrom the superheater by turning the valve in the pipe F, and escapes ina thoroughlyT dry and superheated condition, and is discharged in numer-9o ous jets into the smoke-stack. When used on a locomotiveboiler, thewaste steam may be utilized, as indicated in Fig. 1 of the drawings; butwhen employed on a stationary boiler the steam is generally taken directfrom the boiler. The superheated steam escaping into the smoke-stack andcoming into contact with the highly-heated products of combustion isdecomposed, the oxygen uniting with the earbon of the escaping productsconsuming the same, the resulting carbonio acid passing off. Thehydrogen liberated is burned, assisting in heating the superheater, andthus all solid carbon-such as cinders-is burned and prevented fromescaping into the atmosphere.

Having thus described my invention, what I -claim, and desire to secureby Letters Patent, is

l. The combination, with a steam-boiler, or" a superheater connectedwith the boiler, and

a blower connected with the superheater, and

located in the lower part of the smoke-stack, the superheater beingenlarged and located in the enlarged part of the smoke-stack above theblower, the connecting-pipes being provided with suitable valves forcontrolling the iiow of steam, substantial] y as specified.

esame 2. The combination, with the superheater connected with theboiler, and the blower connected with the superheater, of the pipeleading from a valve-chest connected with the steam-chests ofthecylinders, the valve, and its operating mechanism, whereby the steam maybe superheated and employed in a dry state, and also for consuming thesmoke and creating a draft in the furnace, substantially as set forth. y

In testimony whereof I afiix my signature, in presence of two witnesses,this 24th day of May, 1882.

HENRY D. BANNISTER.

Vitnesses:

G. F. MoKNrGr-rr, E. H. GRIGGs.

